Reamer.



A. MGARTHUR & W. PERCY.

BEAMER.

APPLICATION FILED Nov. 1a, 1913.

1,1 1 1,396. Patented sept. 22, 1914.

UNITED STATES-PATENT oEEicE.

ANDREW MeAETHUE AND WILLIAM BERCY, or LoNE TREE, WASHINGTON.

y BEAMER.

To all whom it 'mag/ conc-em:

Be it known'that we, ANDREW MGARTHR` and WILLIAM PERCY, citizens ofthe United States, residing at Lone Tree, in the county i of Chehalis and .State of -Vlashingtom` have invented certain" new and useful Improvef ments in Beamers; and we do hereby declare the following to be a" full, clear, and exact description ofthe invention, such aswill enable others` skilled'in the art to which it appertainsto make and use the saine.

Our invention vrelates to reamers and `our object is to supply a ream'er that will be of small cost, vsimple in construction, eiicient in operation, and'one easily handled and controlled whenin action.

In the drawingsfherewith which `are made a part of thislapplication, Figure l shows a formed lalong the sides of the shank vportion j 'and lextending to the lower end thereof in-` i ii r15"'tersectingthe cutting members at thispoint sectionalview `'of a ledge ofV stone, a `drill hole previously made therein and a reamer in position in` said hole afterhaving reamed the hole a shortdistance. Fig. 2 represents a sectional viewon the line 2-2 of Fig. l..

Fig3 is a sectional view `on ,lines g3 3 of Fig. l. Fig. t represents a modified form of the cuttingedge of `a reanier, said cutting edge being convex in form.

In the detailed description of ouiyinven`r l tion numerals willy be `used to4 indicate the various parts `and the same numeral willbe used toin'dicatej the same part throughout the various views. f

A shank portion 8 formed of t-ool steel of any desired length or diameter havingcutting members 9 formed on the lower end thereof extending at right anglesto the body portioneon opposite sides-thereof and in a plane with each other and beyond theA sides thereof a distance `determined by ther size of the cutting which is desired to be made at the sides of the holetov be reamed.

iLongitudinally extending ribs l() are at their center as in Fig. 3. Said vribs `are adapted to engage against the wall ofthe hole on each side and half way between the i Copies of this patent inay be obtained for cuttings made by the reanier,4 while the reamer is in operation, fon the purpose of Specification of Letters Patent.

drill.

guiding the cutting members. `An opening or passage ll is formed in the center of the shank portion extending 4the whole length thereof adapted fory the passage'of air or water` to the hole, as may be required. The

.upper endrof the said shank portionhas an aperture extendingv downwardly, threaded to adapt it for use on a machine 'air drill. Vhen in use on a hand air 'drill'the aperture and vthreads may beomitted.:^` l

v Patented sept. 22, 1914. ApplicationledNfovember 13, 1913. Serial No. 800,856. l I y screw y The object to be attained `by rea-ming aj y hole and rforming diametrically opposed slots in connection therewith is to direct and during the blasting and in al measurecoiitrol the line of cleavage. a y l In operation the reamer is attachedto the lpartially control theV eect ofl the explosion i air drill mechanism'and` is used substantially as an ordinary drill bit, except that while the latter is used to form a hole in the rock the reamer is usedy isoform cuttings in the rock at the sides of the hole formed by a From the foregoing description it is believed that as the construction, advantages and manner of .using our invention'have vl/Vhat We claim and desireto protect by Letters Patent is guide ribs disposed.longitudinallythereof at diametrically opposite points adapted 'toy guide the shank along the walls of the hole;`

two outwardly projecting cutting members at diametrically opposite points at the lower end of the shank'and intermediate said longitudinally arranged ribs; said cutting "members bei-ng adapted to cutlongitudinal `grooves alongthe walls of the hole for directing the plane of cleavage while blasting.

Intestiinony whereof we have signed our naine to this specification in the presence of 'two subscribing witnesses.

f `ANDREW MCAETHUR. WILLIAM IVERCY.

Witnesses: M. O. MCCLELLAN,

J. H. CHAMBERLAIN.

vfive cents each, by addressing the Commissioner of Patents, Washington, D. C.

'been fully set forth, further description is l. ldeemed unnecessary. -f

A reainer, having a shank'portion; two 

